SEO Image Optimizer Wizard

Great app that has improved my shop. But it does make some wild claims about the time "it saves you". Additionally, it swings my site between 83 and 79% optimized when I run the test on separate days without changing anything! (which is not ok) It doesn't allow me to deselect google ads (which I have no intention of using). As for starting with a sale, I'm aiming to use discount vouchers instead.
I actually, give it a 3.5 at the moment but if this changes, I'll write an update.